This overview focuses on a comparison of lossless compression capabili
ties of the international standard algorithms for still image compress
ion known as MH, MR, MMR, JBIG, and JPEG. Where the algorithms have pa
rameters to select, these parameters have been carefully set to achiev
e maximal compression. Compression variations due to differences in da
ta are illustrated and scaling of these compression results with spati
al resolution or amplitude precision are explored. These algorithms ar
e also summarized in terms of the compression technology they utilize,
with further references given for precise technical details and the s
pecific international standards involved.